Well I did not want to get to detailed on this forum if no one here has spent time on one. They can be a pain sometimes I installed a new exhaust system on my sons KLX110 and now it will not start? The bike had the stock exhaust and air box both with mods and some jetting. I got it to run last night (took awhile) but thought before I ran it any further I should check the valves, the valves were slightly loose but not bad I set them to .004 MM. Other issues to through in to the mix before the pipe change 1) It has never returned to idle like it should 2) IT coughs sometimes as you let off the throttle Thank You Dan
Your jetting may be too lean for the new pipe. It will start with the choke, won't it? Let it warm up with the choke. Then try turning the fuel screw out about a half a turn at a time and adjusting the idle as you go. If the fuel screw has to be turned out more than 3 turns from fully closed, then you need to get a slightly larger pilot jet. Once the pilot circuit is rich enough, it should idle nice and low and return from being revved nice and quick. If the bike still has lack of power issues at higher speeds then you will need a bigger main jet and possibly to raise the needle.
It will not start with the choke out ether. when I pull the plug it is slightly wet Perhaps it is too rich but I am leaning toward to lean also? I wander if there is a jet kit for this bike.
Not returning to idle is a classic symptom of the pilot circuit being too lean. Try turning downthe idle slightly, then adjust the fuel screw two turns out from closed for a starting point.
Check spark. If your spark is weak, you might get hard starting and poor running. It should be bright blue.
Weak spark (many reasons). Override kill sw. Flooding due to contaminated carb/stuck needle. Valves too tight. Rag in air boot (seen this a lot). * Remove filter, install fresh plug, gas off, shoot a touch of starter fluid in open carb. Close and kick. If that don't get it to least turn over for a bit ya might want to take it in. Kinda tough to diagnose a no-start w/o being hands on. Those things are pretty bullet proof. Usually neglect (carb goo) /damage (plug wire yanked off etc.) is the primary cause of no start/running issues on these lil guys. Best of luck, bud. Edit: just read "plug is wet". It's flooded. Remove plug, kick a millions time to clear chamber, or let sit a couple hours, install fresh plug and retry. I've had good luck with a tiny shot of WD40 down the plug hole then a few kicks w/ the plug out to clear it. No-start's on these are usually due to a butt-simple reason. Keep yer eye peeled for the obvious.
Update, Pilot was clogged solid Changed out the main and pilot to 85/40 and installed a new plug still not starting so I ran down all grounds and elec connections found nothing major? Put it all back together and it started first kick without the use of the choke I still have a small issue I wish to over come. There is a small hesitation off the bottom, it is not bogging, just stuttering ? 1) go one step larger on the Main 2) same on the Pilot 3) Buy a adjustable needle from Too Bros Thank You Dan L
See? Goo-be-gone fixes everything. Simple reason, easy fix. Stumble/bog = lean. Gurgle/blubber = rich. If the air screw is blocked or non-adjustable, try pulling the cap and adjusting it or going up one size on the PJ. Make sure EVERYTHING is spotless in there first. Always drain your carb after riding. Fuel nowadays has a lot of alcohol and crap in it that is a breeding ground for goo. Carbs work like this (very over simplified): Idle - 1/4 T.O. = screw - PJ 1/4 - 1/2 T.O. = PJ - Needle 1/2 - 3/4 T.O. = Needle - Main 3/4 - WFO = (Needle VERY VERY slightly) - Main.
It appears that the switch may be the issue , I took it for a ride down the street this afternoon and it died but restarted after I flipped the switch off and on a few times. Other then my elec issue it pulls hard up my hill with the 85/42 jets and the Yosh pipe. Something I realized is the bike will start and run without the choke even when cold, before you always needed the choke, now the idle will not change when the choke is pulled out warm or cold. I am not sure what is causing the issue but perhaps due to the pipe and air box mod plus being jetted correct it no longer needs the choke?? Dan L
